Desperate need for help with official upgrade failure.Support

I have finally found out how to upgrade my Galaxy Spica. Samsung just came out with the info on their Danish site. Unfortunately, I followed the instructions, including installing the new PC software, but the upgrade was unsuccessful. I was prompted to do an emergency restore, but the mobile seems to have frozen during the boot up sequence, while connected to the PC. It has been a half hour and nothing has happened.

There is a message that I shouldn't disconnect the mobile from the computer, so assume I have to do something to reboot the phone. How do I do that?